void mos6581_device::device_start()
{
// resolve callbacks
m_read_potx.resolve_safe(0xff);
m_read_poty.resolve_safe(0xff);
// create sound stream
m_stream = machine().sound().stream_alloc(*this, 0, 1, machine().sample_rate());
// initialize SID engine
m_token->device = this;
m_token->mixer_channel = m_stream;
m_token->PCMfreq = machine().sample_rate();
m_token->clock = clock();
m_token->type = m_variant;
sid6581_init(m_token);
sidInitWaveformTables(m_variant);
}
void sid6581_init (_SID6581 *This)
{
This->optr1.sid=This;
This->optr2.sid=This;
This->optr3.sid=This;
This->optr1.modulator = &This->optr3;
This->optr3.carrier = &This->optr1;
This->optr1.filtVoiceMask = 1;
This->optr2.modulator = &This->optr1;
This->optr1.carrier = &This->optr2;
This->optr2.filtVoiceMask = 2;
This->optr3.modulator = &This->optr2;
This->optr2.carrier = &This->optr3;
This->optr3.filtVoiceMask = 4;
This->PCMsid = (UINT32)(This->PCMfreq * (16777216.0 / This->clock));
This->PCMsidNoise = (UINT32)((This->clock*256.0)/This->PCMfreq);
This->filter.Enabled = TRUE;
sidInitMixerEngine(This->device->machine);
filterTableInit(This->device->machine);
sidInitWaveformTables(This->type);
enveEmuInit(This->PCMfreq, TRUE);
MixerInit(0);
sidEmuReset(This);
}
